firestone
noun
fire·stone ˈfī(-ə)r-ˌstōn 
1
: pyrite formerly used for striking fire
also : flint
2
: a stone that will endure high heat
Word History
First Known Use
before the 12th century, in the meaning defined at sense 1
Biographical Definition
Firestone
biographical name
Fire·stone ˈfī(-ə)r-ˌstōn
Harvey Samuel 1868–1938 American industrialist